Humidity sensing properties of Cu20-PEPC nanocomposite films

A blend of copper oxide nanopowder （Cu2O）, 3 wt.%, and poly-N-epoxypropylcarbazole （PEPC）, 2 wt.%, in benzol was drop-casted on glass substrates with pre-deposited surface-type silver electrodes for the fabrication of Cu20-PEPC nanocomposite thin films. The thicknesses of the Cu20-PEPC films were in...

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Bibliographic Details
Published in:半导体学报 2012, Vol.33 (7), p.11-15
Main Author: Kh. S. Karimov M. Saleem Z. M. Karieva A. Mateen M. Tariq Saeed Chani Q. Zafar
Format: Article
Language:Chinese
Subjects:
传感特性
复合材料薄膜
湿度
电阻测定
直接测量
纳米复合材料
纳米复合膜
纳米复合薄膜
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Summary:A blend of copper oxide nanopowder （Cu2O）, 3 wt.%, and poly-N-epoxypropylcarbazole （PEPC）, 2 wt.%, in benzol was drop-casted on glass substrates with pre-deposited surface-type silver electrodes for the fabrication of Cu20-PEPC nanocomposite thin films. The thicknesses of the Cu20-PEPC films were in the range of 10-13 μm. The effect of humidity on the electrical properties of the nanocomposite films was investigated by measuring the capacitance and dissipation of the samples at two different frequencies of the applied voltage： 120 Hz and 1 kHz. The AC resistance of the samples was determined from the dissipation values, and the DC resistance was measured directly. The effect of ageing on the humidity sensing properties of the nanocomposite was observed. After ageing, it was observed that at 120 Hz and 1 kHz, under a humidity of up to 86% RH, the capacitance of the cell increased by 85 and 8 times, and the resistance decreased by 345 and 157 times, accordingly, with respect to 30% RH conditions. It was found t
ISSN:1674-4926